Cannot communicate with any modules except DME and TCM

[Jakal702]

Hello,
I posted recently about issues with trying to obtain a new key for 2001 X5 4.4i. After paying the dealer for a new key, it did not work, and would not let the car start (or crank) however all the electronics in the car turn on. Dealer told me it was because they cannot communicate with the EWS. Once I was home, I tried to communicate with the EWS using INPA and NCS Expert, but I was unsuccessful. Then, I realized that I cannot communicate with any modules in the car at all other than the DME and the TCM. Can anyone help me out as to what the problem can be? Dealer says water corroded wiring to the EWS module so it doesn’t work, but this doesn’t add up to me because the car still starts with the first key I had (and currently have). They say once they address the connection problem to the EWS, they can find out if the key is bad, or if it’s the car refusing the key. Can anyone help me out as to what the issue may be here? Any tips would be greatly appreciated because I’m completely stumped, and out $300 for a key that doesn’t work.

Thanks!